Drill.



L. W. BUGBEE.

DRILL. APPLICATION FILED JAN. 9 1915.

' 2 SHEETS-SHEET 1.

W/TNESSES: l/VI/E/VTOI? Y LUC/A/Y WVBUQBVEE A TTOR/VEYS Patented Mar. 14,191

M. W #QJ MW THE COLUMBIA PLANOGRAPH C0,, WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

LUCIAN W. BUGBEE, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOB T0 AMERICAN OPTICAL COMPANY, OF SOUTHBRIDGE, MASSACHUSETTS.

DRILL.

To all whom it may concern:

Be it known that I, LUCIAN W. Bncenn, citizen of the United States, residing at Southbridge, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Drills, of which the following is a specification.

This invention relates to improvements in drills, and has particular reference to an improved type of drill especially adapted for use inthe drilling of ophthalmic lenses.

One of the objects of this invention is the provision of a simple, inexpensive and durable construction in which the parts are so arranged that either flat, concave or convex surfaces may be satisfactorily drilled substantially normal thereto without the necessiityl'of any adjustment of the parts of the ril r A further object of the invention is the provision of an improved machine of this character in which the work will at all times be satisfactorily supported immediately beqneath the drill irrespective of the curvature of the work. 1

Other objects of the invention include a simplification of construction, arrangement and operation of parts, substantially as hereinafter described, and it will be-understood that any modifications may be made falling within the scope of the appended claims without departing from or exceeding the spirit of this invention.

Figure I represents a front elevation of the drill. Fig. II represents an enlarged fragmentary elevation with a lens in position. Fig. III represents a sectional view of Y the parts shown in Fig. II with the lens in reversed position. Fig. IV represent a view similar to Fig. III of a modified form of construction. Fig. V represents a sectional view on theline VV of Fig. I. Fig. VI 1 represents a detailed view of a modified form of abutmentor stop. j

In the drawings, in which similar characters of reference are employed to denote corresponding parts throughout the several views, the numeral 1 designates the base of the machine having at the upper portion thereof the flange 2 providing the tank 3 to receive superfluous mlange and products of drilling. If desired, an outlet may be provided for the tank3jnormally closed by a plug 4 which may be removed when desiredto drain the tank. In addition the Specification of Letters Patent. 7 Patented 11a 14 1916 Application filed January 9, 1915. Serial No. 1,439.

tank is preferably provided with the. well or reservoir 5 into which the mlange will drain, said reservoir being closed at the lower end of a plug 6 and being adapted to receive a brush 7, by which a small portion of the mlange may be dipped out of the well 5 and placed on the lens 8 to be drilled.

Rising from thebase 1, preferably at the rear thereof, is a standard 9 having suitable bearings for the drill spindle 10 and bearing the handle 11 suitably'engaging the drill spindle to reciprocate the same. Rising from the base centrally of the tank 3 is the boss or flange 12 which preferably extends at'least as high as the flange 2, while passing downward through the boss is the stud 13 bearing on its upper end the table 14 having a portion 15 interlocking with the boss or flange 12. Rising from the table 14: in axial alinement with the drill spindle 10 is a post 15 having a tapering or pointed upper 'portlon 16 adapted to provide a rest for the lens 8, while adjacent the post 15' is a sec' ond post 17 bearing an adjustable 'screw'18' located just above the point 16, to engage the edge of the lens and limit the inward movement thereof.v If preferred, in place of the screw 18 a plain cam 18 as shown in full lines in Fig. IV may be used for the stop, or an eccentrically mounted star wheel such as is illustrated in Fig. VI, a spring washer, set screw or the like locking the stop against accidental rotation. 7

Mounted on the table 14: is a slide 19 havthe jaws 24:, from which risethe pins 25 for engaging the inner end of the lens.

In the preferred embodiment of this inof the slide. The lug 29 has risingtherefrom'the turret 30, provided with a plurality of annular grooves 31 which are adapted to receive the outer end of a lens. It will thus be seen that the pins 25 in combination with the turrets 30, serve to engage the edge of alens at four points and thus to invention, the outer portion ofthe lens arm sure proper geometrical centering of the same on the lens arm 23. To hold the lens in position on the armany suitable mechanism may be employed, that here shown consisting of the guide 32 extending into a recess 33 in the clamp slide 27 and having mounted thereon the spring 84:, yieldingly forcing the clamp slide inward into position to engage and hold the lens against the pins 25, as is clearlv illustrated in Figs. II and III.

T he operation of the drill and particularly the ease with which toric lenses or the like may be drilled, will be best understood by reference to Figs. II and III, from which it will be seen that when a strong toric lens for example is to be drilled, the clamp slide 27 is suitably drawn back as by engage- 1 ment with one of the pairs of lugs thereof a sufficient distance to permit of the insertion of the lens between the pins 25 and the turrets 30. If it is desired to first drill through the convex surface the outer end of the lens is placed in the lowermost groove 31 of the turret while the innerend of the lens is rested on the point .16. The relation of the lowermost roove 31 and the point 16 is such as to bring. the lens in exactly correct position for drilling. To drill the other side .01? the lens, to complete the. aperture it is then merely necessary to disengage the lens from the centering pins and: turrets and turn the same over, in this instance, however, the outer end of the lens being placed in the uppermost groove 31 in place of the lowest, bringing the lens into the position shown in Fig. IIL

In those instances where it is desired to drill a piano lens as has been indicated in Fig. IV, the lens is placed for both sides in the middle groove, this groove being disposed substantially on line with or with its center just above the point 25 so that the lens will be held normal to the axis of the drill spindle.

It has been previously mentioned that the lens arm 23 is pivotally mounted upon the main slide 19. The purpose of this is to allow of rotative adjustment in those instances where it is desired to drill the lens either above or below the longest geometrircal axis thereof. In this event it is desirable that the lens arm. and parts carried thereby be locked in their adjusted position. One means of attaining this adjustment is illustrated in Fig. III and a second means in Fig. IV. In Fig. III the arm 23 is shown as provided with a depending portion 35 having fitted thereinto the plug 36 hearing the yielding latch 37 adapted to be engaged .in one of the, plurality of serrations or notches 38 in the block 39 which is set into the rear of the main slide 19. These notches or the like 38 are preferably so arranged that each gives a definite amount of decentration of the lens at the point to 'bedrilled, the degree of movement off preferably indicated by suitable graduations 40 on theupperface of the slide.

In that form illustrated in Fig. IV in place of the pcsilient latch member the pivot 22 may have a loose or rocking fit in either the arm. or the slide, as indicated in Fig. IV, andmay be engaged by a spring ll tending to yieldingly hold the lens armand the slide in tight engagement. When desired to vary the relative adjustment of the parts the outer end of the arm 23 may be raised against the pressure of the spring 41 sufficiently to draw the locking ,pin' 4L2 out of engagement with the notch 43- in theslide, when the arm may be rotated about the post 22 to desired adjusted position and there released when the spring 41 will draw the same downward to securely retain the 1 improved drill should be readily apparent,

and it will be seen that there has beenprocenter being vided a simple and eiiicient mechanism inwhich the various. annular grooves in. the

turret or their equivalent will serve t'o-takea care of various configurations of lenses without the necessity of the contacting members orof the :com-;- plete lens holder as has hitherto been deemed of special adjustment- .v

necessary, while at the same time the complete device -may be readily rotarily adjusted to cause the ,drillingto take place in:

desired position relative to the geometrical axis of the lens.

I claim:

1. Ina lens drill, the combination; with a table, of a work engaging'.post rising, therefrom, a lens holder mounted on the. table adjacent the post and includinga pair. of fixed and a pair of movable lens engaging members, the said movable members being provided with a lens, whereby when the lens is in engagement with the post the angle thereof with the post may be readily varied, substantially lens engaging portions for holding the lens in d1fi'erent angular positions, substantially as described.

plurality of lens retainingv points for engaging the outerendoflthesaid gripping slide having a pair of lens engaging mem- I here provided wlth a plurality of spaced;

3. In a lens drill, thecombination with a I work table, having a post rising therefrom;

of a lens carrying arm mounted: on the table adjacent the post and provided with a pair of lens positioning members, a lens clamping slide movable relative to'the arm, said slide having turrets rising therefrom each provided with a plurality of annular grooves arranged at different heights, the relative position of the work engaging post and the grooves being such that engagement of the outer end of the work in various grooves will vary the angular relation of the work to the line of operation of the drill, substantially as described. 1

4:. A lens drill, including a reciprocable drill and a lens supporting post disposed therebeneath, 'a lens clamping member for cooperation with the post to support the outer end of the lens when the inner end is on the post, said lens clamping member having a plurality of abutments for. holding the outer end of the lens at different heights relative to the inner end which is in engage- Oopies of this patent may be obtained for slide, there being a recess between the slide and arm, a clamping slide mounted in the recess, means for resiliently forcing the clampln slide into operatlve posltion, and means or lockmgr the carrier arm and clamping slide in rotatively adjusted positionrelative to the main slide;

In testimony whereof I afiix my signature in presence of two witnesses.

LUCIAN W. BUGBEE.

Witnesses:

H. K. PARSONS, JOSEPH J. DEMERS.

five cents each, by addressing the Commissioner of Patentu, Washington, D. 0. i 

